DC 5V 4-Channel Relay Module with Optocoupler H/L Level Trigger for Arduino  


Module description:
1. the module uses genuine quality relay, normally open interfaces Maximum load: AC 250V/10A, DC 30V/10A;
2. using SMD optocoupler isolation, driving ability, stable performance; trigger current 5mA;
3. the module Operating voltage 5V;
4. the module can be high or low by a jumper setting trigger;
5. fault-tolerant design, even if the control line is broken, the relay will not operate;
6. the interface design of human nature, all interfaces are available through a direct connection terminal leads, very convenient


Module interface:
1. DC+: 5V positive power supply (VCC)
2. DC-: 5V negative power supply (GND)
3. IN: can be high or low level control relay

Relay outputs:
1. NO: normally open relay interface
2. COM: Common Interface Relays
3. NC: normally closed relay interface

High and low level trigger options:
It is low level trigger when jumper connect to IN +, then trigger by IN-
It is high level trigger when jumper connect to IN - , then trigger by IN +

Package:
1* 4 ch relay(Dupont cable not include